CN1207662A

CN1207662A - Water dispersible and flushable absorbent article

Info

Publication number: CN1207662A
Application number: CN96199616A
Authority: CN
Inventors: 帕特里夏·L·克里斯顿; 尼古拉斯·A·阿尔; 雷蒙德·J·德克
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1995-11-22
Filing date: 1996-10-04
Publication date: 1999-02-10
Anticipated expiration: 2016-10-04
Also published as: EP0862402A1; AU7388496A; KR100259734B1; DE69618234T2; TW333448B; ES2164923T3; BR9611614A; CN1239142C; JP3461510B2; WO1997018784A1; JPH11500341A; EP0862402B1; ZA968662B; MX9804035A; KR19990071573A; JP2001214359A; DE69618234D1; HK1015668A1

Abstract

A flushable and dispersible absorbent article is described in the invention. The absorbent article comprises a liquid pervious topsheet which preferably comprises a wet laid, apertured fibrous web having a temporary wet strength resin incorporated therein, the topsheet also having a body surface provided with a plurality of fibrils, the fibrils comprising a water resistant resinous material, a backsheet impervious to bodily fluids which preferably comprises a wet laid fibrous assembly having a temporary wet strength resin incorporated therein, the body surface of the backsheet being coated with a water resistant resinous material, an absorbent core positioned between the topsheet and the backsheet, and means for removably attaching the sanitary napkin to a wearer's undergarment. Apparatus and methods suitable for producing such topsheets and backsheets are also disclosed. The topsheet and the backsheet are joined, at least about their periphery, using a water soluble adhesive. Alternative embodiments of the present invention can also comprise laterally extending flaps.

Description

The absorbent device that water can disperse and wash

Invention field

The present invention relates to as sanitary towel pantiliner, a kind of absorbent device of incontinence protection or similar articles.More particularly, the absorbent device that the present invention relates to is can be in the flush cycle in common lavatory processed to be fallen, and does not cause handling problem thus.

Background of invention

Disposable absorbent article has been sold a lot of years, and has obtained very big success at world wide.For such absorbent device, especially for the needs of the more convenient of sanitary towel and similar articles and independent process method long-term existence.A kind of method that improved like this convenience and independent process can be provided is this processing method lavatory commonly used.But,, will bring the actual danger of handling problems as stopping up so if commercially available sanitary towel is handled by pouring in the common lavatory.

Past attempts has been carried out many trials so that flushable absorbent device to be provided.In British Patent No. 282,447, attempted a kind of part solution, the core of thinking flushable and the barrier layer through water-proofing treatment of otherwise disposing with the isolating needs of this core are provided.At U.S. Patent number 3,078, in 849 (the authorizing Morse on February 26th, 1962) a kind of sanitary towel has been described, in absorbent core, added the temporary transient barrier layer of a fluid sensitivity, but the outer cover of water sensitive has not been taken measures for spreading body fluid.At U.S. Patent number 3,561, in 447 (the authorizing Alexander on March 13rd, 1969) a kind of tectal sanitary towel of supatex fabric that has has been described, wherein this supatex fabric comprises the textile length fiber, and the binding agent that is used for this supatex fabric is the compositions of soft propene acid binding agent and polyvinyl alcohol.Said composition is considered to have enough intensity when moistening is used as outer cover, and when being subjected to slightly stirring, it still can be dispersed in the water simultaneously.A kind of although it is so structure may limit wet strength, and the satisfactory egative film but it has sufficient barrier properties as new-type sanitary towel is impossible.United States Patent (USP) 3,665 has been described a kind of sanitary towel with outer package in 923 (the authorizing Champaigne Jr. on May 30th, 1972), and it comprises a kind of water dispersed adhesive such as the bonding non-woven webs of polyvinyl alcohol.The separator that also comprises the impermeability thin plastic that is arranged between moisture absorption protective pad and outer package in the preferred concrete scheme.This structure has solved the problem that barrier properties is provided by a kind of overstepping one's bounds loose mail with required barrier properties is provided.But, can bring the danger of stopping up sewer pipe so this structure washed repeatedly because this separator can not be dispersed into granule in the lavatory.United States Patent (USP) 5,300,358 (authorizing Evers on April 5th, 1994) have been described this absorbent structure, and its mediella comprises two polyvinyl alcohol films that height active paper structure is arranged therebetween.The all surfaces that may be exposed in the waterborne liquid all will be handled with waterproof material such as fluorocarbon.This absorbent structure also has a tear tape or drawstring, after pulling off when handling, thinks height active paper structure is exposed in the water, then water is sucked without the surface of water-proofing treatment so that they can dissolve.Needs to tear tape obviously are inconvenient.

Therefore, an object of the present invention is to provide a kind of absorbent device, its operating characteristic (as the wearer comfort sense, anti-leak and similarity) quite or surpass those of absorbent device same period.The absorbent device that another object of the present invention provides has improved convenience and separate operation when exhausted articles for use are handled.Another purpose of the present invention provides a kind of absorbent device of handling in the common lavatory that pours, and when exhausted this articles for use are exposed in the water and are subjected to the immixture in common lavatory, is easy to disperse to become the fritter part.

Brief summary of the invention

The invention provides a kind of easily flushing and disperse to become the absorbent device such as the sanitary towel of fragment in normal lavatory.The preferred sanitary towel of the present invention comprises a saturating liquid top flat, the egative film of not saturating body fluid and place top flat and egative film between absorbent article core, and sanitary towel is connected to parts on wearer's underwear with removable.The alternative concrete scheme of the present invention can also comprise the flap that side stretches.

The preferred saturating liquid top flat of the present invention comprises a kind of wet-laying porous fabric that wherein is mixed with temporary transient wet strengthening resin.The part of this fabric health face also has a kind of resin material.A kind of waterproof resin material that on top flat health face, provides with stamp that preferred this resin material contains with the fibril form.On the other hand, this resin material can provide surface energy gradient between its health face and its medicated clothing face to this top flat.The preferred top flat of the present invention is collected body fluid with fabulous speed, and is used for preventing body fluid its dignity of moistening once more, therefore when wearing sanitary towel of the present invention, feels well.

The preferred egative film of the present invention has a wet-laying fibre assemblies that wherein is mixed with temporary transient wet strengthening resin.Also applied a kind of waterproof resin material on this egative film, this material makes the saturating body fluid of this egative film not damaging adhesive under unfolded situation on the egative film.Egative film described in the present invention has been represented the improvement that is better than this area prior art, reason is that the flushable absorbent device of prior art uses the material of very low critical surface tension to assist in ensuring that egative film is waterproof usually, and the result is difficult to that such egative film is sticked with glue agent bond on the residue assembly of sanitary towel.There is not this class connectivity problem in egative film of the present invention.

Being assembled into of this sanitary towel will scribble the one side of waterproof resin material towards core on the egative film.Core and top flat split thereon, by the known method of those of ordinary skills these parts are coupled together then.The preferred sanitary towel of the present invention is to use water soluble adhesive peripheral bonding at each parts at least, so do the time spent when sanitary towel is subjected to water in the lavatory, each parts can separate.

Brief description of drawings

Though in claims of this description ending place, particularly pointed out and obviously illustrated and thought to form the claimed subject content of the present invention, believe following description in conjunction with the drawings, will be better understood the present invention, wherein:

Fig. 1 is the plan view from above of the preferred sanitary towel of the present invention embodiment, shown the understructure of removing behind the part top flat;

Fig. 2 is along the sectional view of the amplification of 2-2 line among Fig. 1 in the preferred sanitary towel embodiment shown in Figure 1;

Fig. 3 is the side view that is applicable to the signal of the device that applies egative film of the present invention or print top flat of the present invention;

Fig. 4 is applicable at the coated on both sides egative film of net of the present invention or prints the side view of signal of another device of top flat;

Fig. 5 is the plane graph of top flat of the present invention;

Fig. 6 is the sectional view that amplifies along top flat 5-5 line of the present invention;

Fig. 7 is similar to Fig. 6, but the sectional view that another web frame amplifies;

Fig. 8 is similar to Fig. 6, but the sectional view that another web frame amplifies;

Fig. 9 is that amplification is very big, as the perspective view of the single fibril 54 of description among Fig. 6-8;

Figure 10 is the plane graph that is applicable to the device that washability is determined according to the described method of Test Methods section below;

Figure 11 is the sectional view of being got along the 8-8 line of Figure 10 washability device;

Figure 12 is a perspective view, is used for measuring the device assembly of differential static pressure in order to demonstration.

Being described in detail of invention

This this used term " absorbent device " is meant the article that are used for absorbing and keeping the human body transudate, is meant more specifically or places to absorb and to keep the article of the exudate that various human bodies discharge near wearer's body.What describe at this used term " disposable " is the absorbent device of not planning to wash or store or do absorbent device (abandon and preferred recirculation after promptly being to use once, make mixed fertilizer or handle in the mode that is suitable for environmental conservation in addition)." monoblock type " absorbent device is meant each separating part combined and forms one and coordinate whole absorbent device, so they do not need other operation part as the cover that separates and the absorbent device of protective pad.Disposable integral absorbent device embodiment preferred of the present invention is the menstruation protective pad, and sanitary towel 20 is shown among Fig. 1.Be meant by the women at this used term " sanitary towel " and near perineal region, dress, normally at the genitourinary/urogenital outside absorbent device of dressing, it is used to absorb and keeps menstrual fluid and from intravital other vaginal discharge of wearer (for example blood, menstruation and urine).Part articles for use in wearer's vestibule, between the lip of part outside wearer's vestibule are also included within the scope of the invention.Be meant outside visible female sex organs at this term of using " perineal position ".But the present invention should be interpreted as the feminine hygiene or menstruation protective pad such as the scanties lining that also can be used for other, perhaps other absorbent device such as diaper, training pant, incontinent person's protective pad and similar articles.

The detailed description of sanitary towel of the present invention

Fig. 1 is the plane graph that is in the sanitary towel of the present invention 20 of flattened state, and the part of this structure has been cut so that more clearly illustrated the structure of sanitary towel 20, and this sanitary towel 20 towards or the contact user that part of towards the observer.As shown in Figure 1, this sanitary towel preferably includes a saturating liquid top flat 24, the one liquid-tight egative film 26, that is connected with top flat 24 places the absorbent article core 28 and between this top flat 24 and the egative film 26 to be used for removable sanitary towel 20 is connected to connector 30 on wearer's the underwear.

There are two faces in this sanitary towel 20, Body contact face or " health face " 20A and a medicated clothing face 20B.Similarly, each contained ingredient all has a health face (representing connecting A behind the label of these parts) and a medicated clothing face (connecting B behind the label at these parts represents) in the sanitary towel 20.The sanitary towel 20 that is shown among Fig. 1 is observed from its health face.Health face 20A is adjacent to the user health when using this sanitary towel 20, and the medicated clothing face is over there, places in abutting connection with the underwear of user.There are two centrages in sanitary towel 20, a longitudinal centre line L and a transverse centerline.Be meant on sanitary towel 20 planes at this used term " vertically ", be divided into a line, the axle of the two-part vertical in the left and right sides consistent (for example almost parallel) with the wearer's that stands that will wear sanitary towel 20 health or be a direction.Can exchange at this term of using " laterally " or " side direction ", be meant in the plane of sanitary towel 20 normally and vertical vertical line, axle or direction.

Also demonstrating this sanitary towel 20 among Fig. 1 has a periphery 21 that is limited by the external margin of sanitary towel 20, and wherein specifying long limit is 23, and the end limit is 25.Zone line 33 places between two petiolareas 33.Preferred this petiolarea 33 12% to about 33% of about sanitary towel length that longitudinally stretches out from the edge in middle zone 31.Be included in JIUYUE, 1987 about the detailed description of sanitary towel that zone line 31 and two petiolareas 33 are arranged authorized in the United States Patent (USP) 4,690,680 of Higgins on the 1st.

Though can fit together top flat, egative film and absorbent article core according to various known construction profile (comprising so-called " tubulose " product or flank product), but normally those are disclosed in United States Patent (USP) 4 to preferred sanitary towel profile, 950,264 (authorizing Osborn August 21 nineteen ninety); United States Patent (USP) 4,425,130 (authorizing Desmarais on January 10th, 1984); United States Patent (USP) 4,321,924 (authorizing Ahr March 20 nineteen eighty-two); United States Patent (USP) 4,589, the product of 876 (authorizing Van Tilburg on August 18th, 1987).Introduce these patents as a reference among the present invention.What show among Fig. 1 is the preferred embodiment of sanitary towel 20, and wherein the length of top flat 24 and egative film 26 and wide size are usually greater than the corresponding size of absorbent article core 28.Top flat 24 and egative film 26 extend beyond the edge of absorbent article core 28, have therefore formed at least a portion periphery 21. Absorbent article core

Absorbent article core 28 can be the absorbent device arbitrarily that can absorb and keep liquid (for example menstruation and/or urine).As shown in Figure 1, absorbent article core 28 has a health face, a medicated clothing face, side and end limit.The material of the available various absorption liquid that use in sanitary towel usually and other absorbent device as the wood fragments oar of so-called gas felt are manufactured absorbent article core 28 with various sizes and shape (for example: rectangle, ellipse, hourglass shape, splayed, asymmetric shape etc.).The example of the hygroscopic material that other is suitable comprises corrugated cellulose wadding; The meltblown polymer that comprises common shaping (coform); Stiffening modification of chemistry or cross-linked cellulosic; Synthetic fibers as texturized polyester; Peat bog; The fabric that comprises outer package fabric and laminate fabric; The moisture absorption foam; The moisture absorption sponge; The superabsorbent polymer; The Binder Materials of moisture absorption, or the combination of any suitable material or various materials, or these mixtures of material.The profile of absorbent article core and structure can be that various (for example this absorbent article core can have all thickness district (for example processing the centre thicker), hydrophilic gradient, superabsorbent gradient or lower density and lower average quantitative collection district; Perhaps can also comprise one or more layers or one or more structure).But total wettability power of absorbent article core should adapt with the design (calculated) load of sanitary towel and the purposes of expection.And the size of this absorbent article core and wettability power can be according to different purposes such as incontinent person's liner, scanties lining, conventional sanitary towel or overnight hygienic band and are different.

The typical absorbent structure that is used as absorbent article core among the present invention is disclosed in United States Patent (USP) 4,950,264 (authorizing Osborn August 21 nineteen ninety); United States Patent (USP) 4,610,678 (JIUYUE was authorized Weisman on the 9th in 1986); United States Patent (USP) 4,834,735 (authorizing Alemany on May 30th, 1989); With european patent application 0 189 683 (The Procter ﹠amp; Gamble Company, the name with Duenk etc. is disclosed on October 22nd, 1986) in, the present invention introduces these patents as a reference.The absorbent article core embodiment preferred comprises wood fragments oar and superabsorbent mixture of polymers.Correct grinding goes into that suitable wood pulp is that (Memphis TN) provides by Buckeye Cellulose Corp. in the gas felt under the Foley Fluff trade mark.Suitable superabsorbent polymer is that (Naperville IL) provides under the trade mark of Nalco 1180 by Nalco Chemical Co.. Egative film

Egative film 26 is not saturating body fluid (for example menstruation and/or urine), but can see that it easily is dispersed in the cold water under slight the stirring from flushing common lavatory.Following during when using in the method test described in " method of testing " part, be higher than 12cm and do not leak basically if used material can be kept hydrostatic head, then this material is a body fluid (i.e. " waterproof ") thoroughly not.Egative film 26 is preferred with the wet-laying fabric manufacturing that contains temporary transient wet strengthening resin.A kind of waterproof resin material of also preferred coating on this fabric.This egative film preferably has delustring and handles finished product to obtain more the outward appearance as fabric.And when preventing that exudate from passing through egative film 26, this egative film 26 allows steams overflow (being breathable) from absorbent article core 28.

Though the wet-laying fabric of the preferred a kind of coating of the present invention, suitable also have any not saturating body fluid, but be dispersed in the fiber module in the cold water easily under slight the stirring.Therefore suitable material comprises hydrophilic fibers assembly combing, air lay or wet-laying.Suitable fiber includes but not limited to, natural fiber (for example wood or cotton fiber), synthetic fibers (for example polymer fiber such as polyester, nylon, viscose rayon fibre, cellulose acetate, polypropylene, polyethylene fibre), or the compositions of natural fiber and synthetic fibers.Substrate 102 also can comprise the natural fiber of chemical modification at least in part, as cross-linked cellulose fibres.Suitable cross-linked cellulose fibres are disclosed in United States Patent (USP) 4,888,093 (December was authorized people such as Cook on the 19th in 1989); United States Patent (USP) 4,822,543 (authorizing people such as Dean on April 18th, 1989); United States Patent (USP) 4,898,642 (authorizing people such as Moore February 6 nineteen ninety); United States Patent (USP) 4,935,022 (authorizing people such as Lash June 6 nineteen ninety); United States Patent (USP) 5,137,537 (investing people such as Herron on August 11st, 1992); United States Patent (USP) 5,183,707 (authorizing people such as Herron on February 2nd, 1993), the present invention introduces disclosing as a reference of these claim.For guaranteeing to stay easily disperse, this fiber or be hydrophilic in essence, or treated and possess hydrophilic property.As using, utilize water and the contact angle between material surface to define the relative hydrophilic of this material at this.Contact angle is considered to " hydrophilic " material less than 90 ° material.Processing group of fibers component is disclosed in the method for its possess hydrophilic property and authorizes August 21 nineteen ninety in the United States Patent (USP) 4,950,254 of Osbom, and the present invention introduces it openly as a reference.

Be suitable for use as also having of substrate 102 and authorized High Internal Phase Emulsion (HIPE) foam of people's such as Young the middle narration of United States Patent (USP) 5,147,345 (it has been introduced into the present invention as a reference) on the 15th JIUYUE in 1992.Hipe foam also provides the other benefit of energy absorb body fluids, and the sanitary towel's wettability power to small part can also be provided.

As mentioned above, egative film 26 preferably comprises a kind of fabric that applies the waterproof resin material.With reference to figure 3, make to be suitable for the impenetrable liquid of making egative film 26 but the method for flushable net comprises the following steps.The substrate 102 that one first side, second side relative with arranged coil stripping from female roller 104.Then substrate 102 is sent into the first stamp station 105, in stamp station 105, comprised 108, one first graining rolls 110 in one first bottom surface and one first feed roller 106.First bottom surface 108 is and the 110 relative arrangements of first graining roll, thereby forms one first roll gap betwixt.Periphery at first graining roll has many holes.In preferred embodiments, first bottom surface 108 comprises first a bottom surface roller around its major axis rotation.After resin material 200 being heated to other processing of fusing point or process, be transported to first graining roll, 110 places by one first conveying machinery device 111.Then this resin material 200 is imposed on and inject substrate 102.

If for guaranteeing that whole transverse width that resin material 200 passes substrate 200 evenly applies when needing use tenslator and tracking means (not shown), then can use this device as known in the art in the method.

Supply the waterproof resin material 200 that is in a liquid state to first graining roll 110.If at room temperature this resin material 200 is solid-state, then can be heated its temperature more than fusing point.In addition, also can use under the room temperature is the resin material of liquid condition.For example, can adopt the prepolymer that comprises the chemism end group.In this case, behind substrate 102 surfaces and inside deposition resin material 200, must in ensuing curing schedule, will convert to solid-state as a kind of resin material 200 of liquid prepolymer.For example, suitable prepolymer curable when photochemical radiation is arranged.

In this method embodiment preferred, first resin material 200 is heated to its fusing point at least, resin material 200 can be flowed.

First graining roll 110 provides one first peripheral speed along its first major axis rotation.Substrate 102 passes first roll gap transmission that is formed by first graining roll 110 and first bottom surface 108 with a transfer rate with respect to first graining roll 110 and first bottom surface 108.Flowable first resin material 200 is put into the hole of first graining roll 110.Pass first roll gap under the situation that substrate 102 contacts in the hole with first graining roll 110, therefore flowable first resin material 200 is administered on the substrate 102 from the hole of first kind of graining roll 110.

Though rotary printing method is known in the art, but be different from existing method part in this method that describes and proposes claim and be according to the present invention flowable first resin material 200 is applied in the process on the substrate 102 appearance first speed difference between the peripheral speed of the transporting velocity that transmits substrate 102 and first graining roll 110.Therefore first peripheral speed of first graining roll 1 10 first speed difference occurs at least about 100% the transporting velocity greater than substrate 102.Term " speed difference " limits as follows:

(peripheral speed-transporting velocity)/transporting velocity * 100%

Preferred first speed difference is to arrive in about 500% the scope about 100%, more preferably is approximately 300% to 350%.

First speed difference makes the graining roll 110 of winning in the shearing motion mode first resin material 200 is applied in substrate 102 surfaces or inner, and therefore within it portion obtain all first resin materials 200 of even single administration, thereby this resin material 200 penetrates substrate 102 and occupies substrate 102 clearance spaces and cavity.This smearing under shear stress used substrate thickening when preventing to use first resin material 200.Thickness is to use the caliber gauge of the Model 65.503 of Japanese Ono Sokki Co. supply to press at 0.95 inch (2.4cm) diameter under the qualification pressure of foot and 0.1 pound/square inch (0.7 kPa) and measures.

As mentioned above, the smearing method determined of first speed difference make first resin material 200 in substrate 102 than common rotary printing method allow to penetrate dark.As non-limiting example, the method following according to the present invention be to the hole that 3.5mm * 1.5mm is arranged, and thickness is to inject resin in the paper of Tad in hole of 0.5mm.After the blade coating process, the resin in the hole has the thickness of 0.10mm to 0.34mm after measured.What is interesting is, on the surface of the coating net 202 that contacts with bottom surface 108, resin material 200 occurred.First side towards the coating net 202 of graining roll 110 and spreading blade 112 does not have resin material 200 usually.In this embodiment, use track less than 1mm ²Have the thickness that the most advanced and sophisticated digital Vernier mircrometer gauge of opposition is measured this resin.Wherein thereby a tip is supported on the eyelid retractor and can measures constraining force.0.01 restrain the thickness of measuring the resin material 200 in the hole that applies net 202 under the constraining force between 1.00 grams.These readings can have the untouchable laser of a 1mm * 2mm visible rays and further definite by a displacement center.

First infiltration of resin material 200 in substrate 102 make the coating net 202 that obtains become impenetrable liquid simultaneously the thickness of substrate do not increase.In addition, the infiltration of resin material 200 in substrate 102 also improved resulting coating net 202 stretching, shear, tear and tear resistance.The hot strength that gained applies net 202 is the twice of the similar substrate net hot strength of same thickness at least.

Continuation is with reference to figure 3, and the roller that can also utilize various types in the inventive method includes, but not limited to screen printing roller and intaglio plate cylinder as graining roll 110.Screen printing is known in the art, illustrates in December in 1986 was authorized the United States Patent (USP) 4,628,857 (having introduced the present invention as a reference) of Coningsby on the 16th.The intaglio plate stamp also is known in the art, United States Patent (USP) 4,634,130 illustrated of authorizing people such as Sheath on February 17th, 1988, and its disclosure of the Invention is incorporated herein by reference with the explanation prior art.

In the preferred embodiment of the invention, for graining roll 110, use be the screen printing roller.The thickness of preferred screen cloth is between 0.002 to 0.007 inch.Preferably, use the 50 order nero screen clothes that 50 * 50 holes are arranged per square inch.This hole is passed the plane and is measured 0.0035 inch, and with respect to location, 20 ° of angles of graining roll 110 circumferencial directions.If desired, during particularly meticulous if desired order size, can use chromed cellular screen cloth because of intensity.

Part from the graining roll 110 of resin to substrate 102 that use is known as the stamp district.If desired, graining roll 110 can also have the not zone of stamp, after this is known as non-stamp district.The stamp district only resin material 200 is deposited on the aligned substrate 102 in stamp district on.Similarly, the zone with the corresponding substrate 102 in non-stamp district will not have resin material 200 (if not completely) relatively.

If a gravure roll is elected to be first graining roll 110, then non-stamp district is the flat site that does not comprise the roller in intaglio plate hole simply just.If select the screen printing roller as first graining roll 110, then the screen printing roller has saturating dividing plate and stops first resin material 200 to pass the screen cloth of partition position.

Normally locate along its length and be parallel to the stamp roll shaft in non-stamp district.What this configuration obtained usually is the zone of locating and do not contain first resin material 200 on backing material 102 perpendicular to machine direction.Can utilize this configuration to provide if desired and be suitable for the net of making diaper chassis, wherein non-coating zone will be determined its lumbar region.

In addition, non-printing area also can be along the circumferential direction localized usually, and what obtain is substrate 102 zones of resin material 200 on the stamp along machine direction location and not.If desired, can be formed on the gained net that cross machine has suitable width with being with or without coating net 202 several multiple unit in resin material 200 zones and putting together.In the position in the non-stamp of correspondence district,, produce the stock roll (roll stock) that is used for subsequent production then along the coating area 202 of machine direction incision gained.This configuration can provide the benefit of large-scale production in the process of disposable absorbent article constructed in accordance.

First scraper 112 is to be used for guaranteeing that first resin material 200 is evenly to prepare across graining roll 110 whole application surface.First scraper 112 is settling with the surperficial discontiguous relation of first graining roll 110, and keeps static when graining roll 110 rotations, and the periphery that allows this scraper 112 to clean first graining roll 110.First scraper 112 can clash any first resin material 200 that does not place the single hole of first graining roll 110, like this to guarantee that all holes are all filled up fully.

First bottom surface 108 is slick, comprises a rotatable bottom surface roller or an immobilized surface.For the embodiment preferred in this narration, first bottom surface 108 comprises the bottom surface roller of a rotation.To provide competent joint between first resin material 200 in the hole of the substrate 102 and first graining roll 110, impel first resin material 200 first graining roll 110 and first bottom surface, 108 mutual extrusion to substrate 102 surfaces and inner smearing.

If select a kind of thermoplastic resin, then preferably first graining roll 110 is heated to prevent flowable first resin material, 200 premature settings as first resin material 200.Found that temperature is that the graining roll and first resin material 200 of about 270 (132 ℃) worked finely, and narrated processing conditions below.

(not shown) external heat first resin material 200 serves as liquid and suitable temperature and viscosity to keep resin material 200 by known methods.Usually the temperature of keeping first resin material 200 is a little more than its fusing point.If first resin material 200 is partly or entirely to be liquid, think that then this temperature is equal to or higher than its fusing point.If temperature is low excessively, first resin material just can not transferred on the substrate 102 from graining roll 110, perhaps, can next not be applicable to above-mentioned cleaning in the process again.On the contrary, if temperature is too high, then first resin material 200 is sticking inadequately, is not suitable in the process of cleaning, and perhaps this material may thermal degradation.And resin temperature should be too not high, can damage substrate 102 like that.In the time of on being applied to substrate 102, the temperature of preferred first resin material 200 is in about 200 °F (93 ℃) arrive the scope of about 250 (121 ℃).This temperature is higher than the fusing point of preferred CA-105 resin (will in following discussion), but is lower than the temperature of melt viscosity when very low.

Can randomly obtain cooling air from first air cooling system 114.This cooling air has cured and is necessary guarantee to impose on already first resin material 200 on the substrate 102 before applying net 202 further following processing.

In the preferred embodiment of the invention, adopt two step cladding processes.Preferred two step of employing cladding processes are that this method provides the coating net 202 with higher impermeability under low coat weight because compare with a suitable step cladding process.In two step cladding processes, can in this stamp station, comprise 118, one second graining rolls 122 in one second bottom surface and one second feed roller 120 with applying in one second stamp station 205 of net 202 inputs.Utilize second graining roll 122 and second bottom surface 118 to use the second time of carrying out first resin material 200 with above-mentioned essentially identical mode by one second conveying mechanism 204 then.In addition, second resin material 400 that is different from first resin material 200 also can be used in second coating procedure.

Second speed difference in second coating step can equal, less than or greater than the speed difference in first coating step.Preferred second speed difference equals first speed difference, particularly when all using first resin material 200 in the first and second stamp stations 105,205.

Also can utilize second cooling air system 126 to guarantee to be applied to first resin material 200 of the substrate 102 that part applies or standby second resin material 400 in second coating step has cured before net 200 is being involved in finished product roller (finished roll) 130 applying.

To apply net 202 by second stripper roll 128 then and strip down, be involved in the finished product roller 130 from second graining roll 122.

In another embodiment of the present invention shown in Figure 4, be applied to simultaneously by the first stamp station 105 coating of using and the coating of using on the first and second relative sides of substrate 102 by the second stamp station 205.Therefrom as can be seen, the networking is by first graining roll 110 first resin material 200 to be applied to first side of substrate 102, by second graining roll 122 second resin material 400 is applied on second relative on the substrate 102 side.In addition, the step in each stamp station 105,205 can be basic identical with above-mentioned step.

As mentioned above, being suitable for the preferred group of fibers component of making substrate 102 is the fabric that wherein is mixed with the wet-laying of wet strengthening resin.Suitable fabric quantitatively be approximately per 3000 square feet 12 pounds, can be from Bellingham, the Georgia-Pacific Corp. of WA obtains, the trade mark is DST-1.Equally also illustrated, preferably on this wet stratified fabric, applied a kind of waterproof resin material and make its not saturating body fluid.The waterproof resin material that is suitable for use as resin material 200,400 is a kind of mixture of thermoplastic resin, can (Columbus OH) obtains, and the trade mark is CA-105 from Century International.Preferred coat weight is in about 0.005 gram/square inch (8 grams/square metre) arrives the scope of about 0.075 gram/square inch (116 restrain/square metre).More preferably coat weight at about 0.015 gram/square inch (23 gram/square metre) in the scope of about 0.035 gram/square inch (54 restrain/square metre).

When utilizing above-mentioned resin application process when a kind of like this waterproof resin coated materials is to the fabric of this wet-laying, the coating net of gained is a saturating body fluid not.Particularly, when the method for describing with " method of testing " part was tested, this coating net can be kept hydrostatic head and be at least about 15 centimetres.Preferred this coating net can be kept hydrostatic head and be at least about 18 centimetres.

The not only saturating body fluid of coating net of the present invention, and they lose mechanical integrity rapidly in being dipped in water the time, resolve into fragment.For example when using the described method of " method of testing " part to assess the erosion of this coating net sample, this applies net and the commercially available object of reference lavatory fabric (CHARMIN that is used as ^) the performance basically identical.Be that coating net sample of the present invention will fragment into small pieces, pass test set easily, do not cause obstruction.The reduction of rupture strength is a kind of metering system of above-mentioned mechanical integrity loss when being exposed in the water.What show in the following table 1 is the rupture strength data of preferred egative film 26 samples of the present invention.

Table 1 coated fiber combination piece number 1 group of fibers component model DST-1 resin-coating material C A-105 coat weight 0.022g/ inch ²Rupture strength (gram) is done 1101 wet (flooding 20 seconds) 477 hygrochases (20 seconds)/dry and cracked 0.43 as can be seen, and the contraction when being exposed in the water in the explosion process (doing value after 20 seconds is 43%) is to such an extent as to mean that egative film 26 has fully been weakened it and will be dispersed into fragment under common toilet flushing process mild or moderate stirs.

The reason of egative film 26 lost strength mainly is because the waterproof resin material no longer makes the fleece waterproof.As what narrated in following " molectron of sanitary towel " part, the setting that comprises the coated fiber molectron of preferred egative film 26 is to make coating surface comprise the health face 26A of egative film 26.When assembling sanitary towel 20 by this way, with the waterproof resin material be arranged at egative film fiber module and will be by between those assemblies of the sanitary towel 20 of body fluid moistening (as top flat 24 and absorbent article core 28).Therefore this coating can prevent group of fibers component absorb body fluids, and this group of fibers component brings essential mechanical integrity can for egative film 26.

Be used for protecting the water-sensitive material that comprises egative film and the hydrophobic material (a kind of typical prior art water-sensitive material is that polyvinyl alcohol and a kind of typical prior art hydrophobic material are fluorocarbons) that uses in prior art, using the preferred waterproof resin material of the present invention is an improvement.Particularly, the hydrophobic material that uses in the prior art has low-down critical surface tension.For example, Teflon ^Critical surface tension less than 20 dynes per centimeter (Adamson A.W. Surface Physical Chemistry, 1976, John Wiley ﹠amp; Sons, New York, 354 pages).Other critical surface tension through the surface that fluorocarbons is handled also is similar.This low critical surface tension means that the absorbent device molectron will more be difficult to make, because low critical surface tension disturbs the bonding of adhesive, adhesive will can not launch on this surface this moment, can not adhere on this surface (low critical surface tension also is the basis of commercially available antifouling item for disposal, because stain can not be adsorbed onto on the surface of low critical surface tension) yet.This means and to guarantee do not have fluorocarbon (result is for guaranteeing those regional complexity of bringing production of fully aiming at regional and other component of sanitary towel), or the surface of fluorocarbon arbitrarily of adhesion zone is handled to improve its critical surface tension at bonding region.On the contrary, the surface that the present invention applies preferred waterproof resin material has the critical surface tension greater than 34 dynes per centimeter, and its measurement is to adopt the modification tappi test method of describing in following " test " method (T 698pm-83).Therefore, can use common production method assembling to adopt the sanitary towel of the preferred egative film of the present invention, and not need additional processing step.

Therefore as used in the present invention waterproof resin material can not only provide and have not the group of fibers component of saturating body fluid surface and (can support hydrostatic head, make it greater than 12cm), but also the coating net is provided, this netting gear has one be fit to use adhesive to be connected to surface (being that critical surface tension is greater than about 34 dynes per centimeter) on other parts. Top flat

Top flat 24 is submissive, soft feeling is arranged and do not stimulate wearer's skin.And this top flat 24 is a liquid, promptly allows body fluid (as menstruation and/or urine) easily to penetrate its thickness.This top flat should be still flushing and disperseing easily when running into mild agitation in common lavatory.The production material of suitable top flat 24 can be various, as air lay, and non-woven material wet-laying or combing.Suitable material comprises natural fiber (for example wood fiber or cotton fiber), synthetic fibers (for example polymer fiber such as polyester, polypropylene or polyethylene fibre) or natural fiber and with the assembly of synthetic fibers.

Preferred top flat 24 comprises the porose fabric of the wet-laying that wherein is mixed with temporary transient wet strengthening resin.The part of this top flat 24 is shown in Fig. 5 and 6.As illustrated in Figures 5 and 6, the wet method net-forming fabric that comprises preferred top flat 24 comprises the fibre assemblies of the wet-laying that big metering-orifice 50 is wherein arranged.Comprise the wood fiber though be used for the preferred fiber furnish of this fabric, preferably approximately 90% eucalyptus fibers and about 10% northern sulphite kraft fibers, other fibrous material comprises, but be not limited to natural fiber (for example wood fiber of other type or cotton fiber), synthetic fibers (for example polymer fiber such as polyester, polypropylene or polyethylene fibre), perhaps the assembly of natural fiber and synthetic fibers also is suitable, as long as this fiber be maybe can be processed into hydrophilic just passable.Can authorize the United States Patent (USP) 3,881 of Benz according on May 6th, 1975, the method described in 987 can be made the porous fabric of this wet-laying on a kind of papermaking machine.Preferably, the drainage element described in the aforementioned Benz patent should comprise and is disclosed in porose (foraminous) part described in the United States Patent (USP) 4,514,345 of authorizing people such as Johnson on April 30th, 1985.The open part that the present invention introduces these patents as a reference.The fiber embryo width of cloth of Zhi Zaoing can use the known common drying mode of field of papermaking those of ordinary skill further dry as mentioned above.For example compress woollen blanket, hot cover, infra-red radiation, blow through exsiccator and Yankee exsiccator, they can also can be used in combination separately.Particularly preferred drying means is to use the compression woollen blanket earlier, uses the Yankee exsiccator then.

Make the group of fibers component of the wet-laying that can obtain having hole density range and percentage of open area scope in this way.As used in this, term " hole density " is used to refer on group of fibers component surface the number in hole per square inch, and term " percentage of open area " is defined as the part that fiber does not occupy on the group of fibers component, is expressed as a percent.Preferred hole density is (1 hole every square centimeter) and about 400 holes per square inch between (62 hole every square centimeter) per square inch in about 9 holes.More preferably hole density is (3 hole every square centimeter) and about 111 holes per square inch between (17 hole every square centimeter) per square inch in about 20 holes.The preferred percentage of open area of the preferred foraminous wet-laying group of fibers component of the present invention is between about 20% to about 50%.More preferably aperture area is between about 30% to about 40%.The hole density of the group of fibers component of particularly preferred wet-laying is about 81 holes (6 hole every square centimeter) per square inch, and aperture area is approximately 36%.

The batching of this fabric also comprises a kind of temporary transient wet strengthening resin.This temporary transient wet strengthening resin helps top flat 24 to keep mechanical integrity in the use of sanitary towel 20, but it does not disturb the dispersibility of top flat 24 in sanitary towel's 20 flushing processes.Suitable temporary transient wet strengthening resin is can (Stanford, the polyacrylamide resin of the Acetic acid,oxo-,monohydrate esterification that CT) obtains, the trade mark are Parez from Cytec IndustriesInc. ^TMParticularly preferably be Parez ^TM631 NC.Work as Parez ^TM631 NC with in the porose fabric that is used in wet-laying in about 0.5% to about 1.0% amount the time, top flat 24 in use mechanical integrity and the dispersibility when handling aspect reach gratifying balance.

This preferred fabric does not have bore portion at the health face and also has a large amount of fibril (fibrils) 54 or " hair ".These fibrils 54 are by separating the surface wettability characteristic that has reduced top flat 24 with wearer's health and any body fluid that can retain in the cellulose health face among the top flat 24A.Table 2 compared top flat 24 the surface wettability characteristic and be used for commercially available sanitary towel (from Kimberly Clark Corp.Neenah, the KO TEX of WI ^OVERNITES) nonwoven top flat.

Table 2

Top flat numbers 12

Top flat model adhesive-bonded fabric of the present invention

Resin-coating material C A-105 does not have

Fibril density 4500 fibril/square inches do not obtain

Surface moist 0.39g 0.49g compares with common nonwoven top flat as can be seen from Table 2, and the preferred top flat of the present invention has improved to a certain degree surface moist.Fibril 54 also makes honorable 24A have pleasant velvety sense of touch.

Fibril 54 preferably includes and is used to apply egative film 26 and makes its not identical waterproof resin material of material of saturating body fluid (CA-105).But following application process only is applied to this waterproof resin material the health face 24A part of top flat 24.Fibril density can about 500 fibrils per square inch (every square centimeter of 77 fibril) change between (every square centimeter of 1700 fibril) per square inch to about 11,000 fibrils.Preferred fibril density about 3000 fibrils per square inch (every square centimeter of 450 fibril) to the variation in (every square centimeter of 775 fibril) scope per square inch of about 5000 fibrils.Fibril length can change between about 0.003 inch (0.07mm) to about 0.04 inch (1.0mm).Preferred fibril length is between about 0.004 inch (0.1mm) and 0.01 inch (0.3mm).The applicant finds that the selection of fibril length and fibril density allows surface wettability and other top flat characteristic (comprising sense of touch) to change to reach the desirable balance of these characteristics.

Using this resin material preferable methods is to be similar to above-mentioned relevant egative film 26 described executing to change the screen printing method.But can understand stamp or spray other method that this resin sprays thing also is that the present invention considers.Such method comprises the spiral spraying, vaporific spraying, straight line spraying, intaglio plate stamp and aniline stamp.Because the fibril of rotary screen printing method energy production ideal dimensions and density also also can be implemented with high paper web linear velocity, so be most preferred.Should also be noted that stamp station 105 as shown in Figure 3, single stamp station is the substrate 102 whole necessary parts that are used to provide fibril 54.

It is variant that coated substrate 102 (referring to Fig. 3) makes its appropriate method that is suitable for use as egative film 26 and coated substrate 102 that it is suitable between the tangential velocity that main difference between the appropriate method make top flat 24 is the transporting velocity of substrate 102 and graining roll 110.Still with reference to figure 3.For the suitable method of coated substrate 102 as top flat 24, the tangential velocity of transporting velocity and graining roll 110 basic identical (being that speed difference is approximately zero).This means the CA-105 resin be stamp on substrate 102 rather than obliterating to net surface.The rheology of CA-105 when being controlled at graining roll 110 upper screen cloth patterns and control molten state, CA-105 prints as above-mentioned fibril 54.Preferred graining roll 110 includes the screen cloth of hexagon interlocking net pattern, and its average pore size is that 0.035 inch and the temperature of keeping resin material are between 200 °F (93 ℃) to about 250 °F (121 ℃).

Adopt above-mentioned preferred screen printing method, fibriilar formation is soluble as follows.Hole on the screen cloth is enough little and resin material 200 viscosity are very big so that resin material itself can not flow through the hole on the screen cloth.Wing 112 force resin material 200 fill up screen cloth the hole so that the meniscus of resin material 200 dangle to bottom surface 108 from screen cloth.Under the situation of graining roll 110 and bottom surface 108 (being shown in a roller in the embodiment preferred among Fig. 3) rotation, screen cloth touches the substrate 102 of 108 roll gaps of graining roll 110 and bottom surface.The meniscus of resin material 200 is transferred on the substrate 102 from sieve screen apertures.Under screen cloth and the isolating situation of stamp net, cohesive force in the resin material and the adhesive tension between resin material and the screen surface cause that part resin material 200 upwards is pulled away from substrate 102 up to the elastic limit of its separating distance above resin material, makes this material break to form fibriilar upper end.This breakaway poing can have the thermometal line/thermometal band 115 of preset distance to control by using with graining roll 110 and bottom surface 108, and this is known in this area.The control breakaway poing produces the fibril of ideal noise diode and ideal form in this mode.

Fig. 7 and Fig. 8 have described the alternative web frame of the present invention.As describing among Fig. 7, group of fibers component 52 does not comprise discrete hole, as the hole 50 of being painted among Fig. 5 and Fig. 6.But be enough to make it can be applied to the liquid transport capacity of absorbent device for keeping, this net comprises abundant inherent porous.The same with the net among Fig. 5 and Fig. 6, fibril 54 be in shape stamp on the uppermost surface of this net, rather than only on surface region between the hole.In addition, if desired, the zone with fibril 54 can be arbitrary shape, pattern or effective coverage, and its density can be uniform or heterogeneous.

Fig. 8 has described another embodiment of fibre structure 52 of the present invention.As shown in Figure 8, net comprises the zone of all thickness or profile.The same with the net among Fig. 7, this net lacks discrete hole, but functional when having enough inherent porous and being included in the disposable absorbent article to keep it.The same with the net in Fig. 5 and 6, fibril 54 be in shape stamp the net the superiors on, rather than the net whole surface up on.

Because netting gear has various profile, it should be understood that in the application process of fibril 54 when using abundant extruding force, it is whole on upper surface really fibril to be applied to net, this be since in the stamp process this net be squeezed into homogeneous thickness and profile.

Can use multiple fleece as backing material 102 according to the present invention.Suitable material below has been discussed.As discussing, preferred backing material comprises the porous fabric of the wet-laying that wherein is mixed with wet strengthening resin.

Fig. 9 has described the physical arrangement as being described among Fig. 6-8 of common fibril 54 in more detail.Fibril 54 preferably includes a shaft portion 55 that extends to top 56 from substrate 57.In formation, resin material is deposited as substrate 57, and the pull-shaped one-tenth axle 55 that makes progress.This resin material breaks away from suddenly with the resin of staying on the graining roll 110, tapers off to a point 56, and it is preferably and is somewhat circle.Fibril is preferably constructed and configuration is to make each substrate 57 separate at least a little, is beneficial to the purpose of collecting and washing so underlying substrate is therebetween exposed at least a little.In addition, fibriilar quantity and size can not too big washability and dispersibility similarly to damage top flat.

Form preferred curing rapidly of ideal height and/or structure back or sclerosis in order to form fibriilar resin material at fibril.In this mode, begin downwards before substrate 57 is subsided at this resin, fibril " is locked " (" lockedin ") and fibril loses its shape.Also help high relatively net spee this relatively short hardening time (perhaps " opening time "), because it guarantees that before next carrying out the net process operation this fiber has cured.

If desired, the coverage ability of top flat 24 can be by strengthening to resin material interpolation dyestuff or the filler of making fibril 54.Suitable masking agent comprises titanium dioxide and calcium carbonate.Fibril 54 is own, and filler helps to cover the body fluid of top flat and lower floor's absorbent article core absorption.This masking agent makes whole top flat by other opaque section is provided, and particularly its upper surface provides cleaning and dry and comfortable outward appearance.

Since the material behavior of fibril 54, length and thickness, the deviation that causes when anti-at least to a certain extent wearer uses contact so it preferably has enough elasticity to wire side.If this fibril is very easy to subside, the separating effect of wearer and the hydrophilic substrate of fiber will disappear so, and can feel that " wetting " sense of touch strengthens.If the fibril quantity of subsiding too much also can be owing to the hole or the aperture that stop up substrate are unfavorable for absorbing liquid.

As describing in Fig. 6-8 usually, fibril 54 stretches out from the dignity of top flat 24 usually.In a kind of preferred configuration, though at least some fibrils can stretch out with various angles, most of fibril vertically stretches out from wire side usually.

In addition, according to aforesaid U.S. Patent 3,881,987 porous fabrics (wherein being mixed with a kind of wet strengthening resin) of making wet-layings also comprise a medicated clothing face 24B on the drainage element of United States Patent (USP) 4,514,345 as described above.Health face 24A and medicated clothing face 24B are separated from each other by a mid portion 24C.Thereby the health face of this net of net of the treated formation of the porous fabric of this wet-laying provides a kind of surface energy to be lower than the structure of mid portion surface energy.In preferred embodiments, the net of handling presents a plurality of zones than low-surface-energy, this zone definitions surface energy gradient, there they with the wire side adjacency of high surfaces energy is arranged.For example, a kind of polyorganosiloxane resin of low-surface-energy can be applied to health face 24A part, and it provides such zone than low-surface-energy.There is the net of this surface energy gradient to have fully and describe, introduces it in the present invention openly as a reference in U.S. Patent Application Serial 08/442,935 (with people's such as Ouellette name, submit to May 31 nineteen ninety-five).

In the preferred embodiment of the invention, top flat 24 be hydrophilic to small part health face 24A to help liquid to pass top flat quickly than non-hydrophilic dignity.This water-wetted surface also helps to eliminate body fluid and flows out top flat rather than flow into absorbent article core and absorbed probability.In an embodiment preferred, before fibril on the stamp, the health face 24A that a kind of surfactant is applied to top flat 24 goes up (for example by extrusion coated and spraying).In addition, also can be by the health face of top flat being handled with a kind of surfactant, it is described in the United States Patent (USP) 4,950,254 of above-mentioned reference, and the present invention introduces it openly as a reference. The adhesive parts

In use, sanitary towel 20 can locate with any bracing or strutting arrangement known for this purpose or connecting device 30.Preferably, sanitary towel places on wearer's the underwear or underwear, and fixed thereon by a kind of clamp device such as a kind of adhesive.

As clearly illustrating among Fig. 2, the preferred sanitary towel 20 of the present invention also comprises a kind of adhesive 32, is used for sanitary towel 20 is connected to wearer's underwear.Adhesive 20 provides a kind of mode that is used for by can sanitary towel be adhered to short crotch area antiseizedly sanitary towel being fixed on the crotch district.Therefore, adhesive coating on the part or all of medicated clothing face 26B of egative film 26.Can be clear that from figure that the adhesive that applies whole medicated clothing face 26B substantially is preferably rectangle.But the coating method that should note other also is feasible.Typical mode be disclosed in pending trial with people's names such as Papa in the U.S. Patent Application Serial 08/401,665 of application on March 9 nineteen ninety-five, the present invention introduces that it is open as a reference.

For keeping purpose of the present invention, water-sensitive adhesive or binding agent also can be at this as adhesive arbitrarily to be used for this purpose in this area, but preferred pressure sensitive adhesive.Suitable adhesive is that (Wauwatosa WI) produces Findley AdhesivesInc..Particularly preferably be hot melt adhesive, the trade mark is 9216-02.

In another embodiment of the present invention, connector can comprise the hook spare of hook and ring mechanical fastening system.For keeping purpose of the present invention, preferred this hook connecting device comprises the water-sensitive material in addition.Find that at present the resin (from the CA-105 of Century Adhesives) that contains the fibril 54 of top flat 24 embodiment preferred also is applicable to and forms this hook spare.Other water sensitivity, thermoplastic resin material also are suitable for.Producing the method for this hook spare and the modular design of this parts is disclosed in the one or more following United States Patent (USP)s: authorized people such as Thomas on October 22nd, 5,058,247,1991; Authorized people and 5,230 such as Thomas on May 26th, 5,116,563,1992, authorized people such as Thomas on July 27th, 851,1993, the present invention introduces these disclosure of an invention parts as a reference.

Before use is placed by sanitary towel, covering a kind of removable release liner 34 on the pressure sensitive adhesive to prevent that this adhesive is dry before use or to adhere on other surface that is not interior crotch area usually.Suitable release liner 34 also is disclosed in the above-mentioned United States Patent (USP) 4,917,697.Any commercially available release liner that is generally used for this purpose also can be with in the present invention.The limiting examples of suitable release liner is BL30MG-ASilox E1/0 and BL 30MG-A Silox 4P/O, and (Menasha WI) manufactures by Akrosil Corporation.

Sanitary towel 20 of the present invention removes release liner and in common mode it is placed.Then this sanitary towel is placed on wearer's the underwear so that adhesive 32 contacts with underwear.This adhesive 32 remains in the use on the correct position of sanitary towel in underwear. The assembly of sanitary towel

Top flat 24 and egative film 26 be respectively in abutting connection with the medicated clothing face 28A and the honorable 28B of absorbent article core 28, and top flat and egative film preferably interconnect by the connected mode (not shown) of knowing in a kind of this area.For example egative film 26 and/or top flat 24 can be passed through even successive adhesive layer, the figuratum layer of adhesive or a series of adhesive line that separates, helix or point are fixed on the absorbent article core 28 or interfix.To achieve the object of the present invention, easy fracture under the gentle agitation that used adhesive should occur when common water closet washes in this preferred sanitary towel 20 of assembling.The adhesive of the satisfaction of having found at present is a hot melt adhesive, can (Wauwatosa WI) obtains, and the trade mark is H-9216-02, and adhesive Emulsion, can be from Air Products ﹠amp from Findley Adhesives Inc.; (Allentown, PA), the trade mark is Airflex 401 to Chemicals Corp..Such adhesive can be used by intaglio plate stamp or adhesive spraying.Other applicable pattern that adhesive is used is that the open pattern network by long filament carries out, it comprises several adhesive silk thread dishes is become a spiral pattern, it is undertaken by the apparatus and method as shown in following patent: authorized the United States Patent (USP) 3 of Sprague Jr. on October 7th, 1975,911,173; Authorized people's such as Ziecker United States Patent (USP) 4,785,996 on November 22nd, 1978; Authorized the United States Patent (USP) 4,842,666 of Werenicz in 1989 in 6 years on the 27th.These patents are introduced into the present invention as a reference.In addition, connected mode also can comprise heat bonding, pressure is bonding or any other each the suitable connected mode or the combination of these connected modes known in the art.

As shown in above-mentioned and Fig. 1 and Fig. 2, in sanitary towel's 20 embodiment preferred, the length of top flat 24 and egative film 26 and width are usually all greater than the length and the width of absorbent article core 28.Top flat 24 and egative film 26 extend beyond the edge of

absorbent article core

28,21 interconnect along periphery at least in peripheral adhesion zone 27, and wherein peripheral adhesion zone 27 is that those parts by top flat 24 that exceeds absorbent article core 28 and egative film 26 limit.Below also point out, top flat 24 is handled so that its health face 24A has a large amount of fibrils (promptly, fibril comprises the part of sanitary towel's 20 outer surfaces), and egative film 26 handled make health face 26A have damp proof resinous coat (that is, damp proof resinous coat is to be arranged on the inboard of sanitary towel 20).

For the purposes of the present invention, top flat 24 and egative film 26 link together at peripheral bonding region 27 in the mode of easy fracture under the gentle agitation that occurs when the common flush toilets.In the known mode of absorbent product field those of ordinary skill,, just can be used for top flat 24 and egative film 26 being linked together in peripheral adhesion zone 27 as long as it does not disturb the dispersibility of sanitary towel 20.Basic identical in order to the suitable manner that connects top flats 24 and egative film 26 in peripheral adhesion zone 27 with the suitable mode that top flat 24 and/or egative film 26 are connected on the absorbent article core 28.Preferably top flat 24 and egative film 26 are linked together with a kind of water soluble adhesive.Suitable adhesive comprises hot melt adhesive, can (Wauwatosa WI) obtains, and the trade mark is H-9216-02 from Findley AdhesivesInc..Preferred water soluble adhesive is an adhesive Emulsion, and it can be from Air Products ﹠amp; (Allentown PA) obtains with Airflex 401 Chemicals Corp..

According to the form of adhesive, water soluble adhesive is applied to sanitary towel 20 by manner known in the art.For example, intaglio plate applies, and slit extruding (slot extrusion) and spray application all are suitable, are when spiraling into a kind of helical structure as filament using of this adhesive particularly.When using, particularly preferably be intaglio plate and apply with above-mentioned preferred hydrosol Emulsion Airflex 401.

As previously discussed, utilize a kind of suitable water soluble adhesive absorbent article core 28 can be connected in top flat 24 and the egative film 26 one or both.In the preferred embodiment of the invention, use preferred hydrosol Emulsion Airflex401 that the top flat 24 and the egative film 26 of sanitary towel 20 are connected on the absorbent article core 28.

If desired, (Wauwatosa, preferred water-sensitive medicated clothing WI) connect adhesive 9216-02 can be used slit extruding or other suitable manner to be applied on the medicated clothing face 26B of egative film 26 and its to be furnished with above-mentioned release liner from Findley Adhesives Inc..

When sanitary towel 20 of the present invention as above-mentioned assembling, then disperse easily under the gentle agitation that it can occur when being subjected to common flush toilets.For example, when " method of testing " part described " high capacity rule " below this sanitary towel adopts when evaluating its washability, they with commercially available lavatory fabric (CHARMIN ^) essentially identical mode washes.Its result can explain by following modes:

1) top flat, absorbent article core and the egative film that connect of water soluble adhesive dissolves rapidly, makes each of sanitary towel

Parts are separated from each other.

2) this separation is exposed to the shielded part of these parts in the water, and the result has reduced these ones

The mechanical strength of part.

3) these parts further are separated into littler granule, pass similar lavatory fabric (CHARMIN ^R) test set of tester.

Optional parts Flap

In other embodiment of the present invention, there are two flaps in sanitary towel, and each flap is adjacent to the side of absorbent article core and stretches out at zone line at least.With this flap be configured as can coat the short crotch area of wearer the edge so that this flap places between wearer's medicated underpants limit and the thigh.This flap is used for two purposes at least.The first, this flap plays and helps prevent menstrual fluid make dirty wearer's health and medicated underpants, and preferably the edge along medicated underpants forms a double wall barrier.The second, this flap is preferably in its medicated clothing face medicated underpants bottom that connector is set so that this flap can turn back, and is connected to the garment side of medicated underpants.Use this method, this flap is used to make sanitary towel to maintain the suitable position of sanitary towel.This flap can be made of various materials, comprises the material that is similar to top flat, egative film, fabric or the combination of these materials.And flap can be a kind of extension that is connected to the individual components on sanitary towel's main body or can comprises top flat and egative film (promptly whole).Be suitable for or be suitable for manyly having the sanitary towel of flap to be disclosed in the United States Patent (USP) 4,687,478 of authorizing Van Tilburg on August 18th, 1987 with what sanitary towel of the present invention used; Authorized the United States Patent (USP) 4,589,876 of Van Tilburg on May 20th, 1986; Authorize in the United States Patent (USP) 4,608,047 of Mattingly with on August 26th, 1986.The present invention introduces these disclosure of the Invention as a reference.

Method of testing

Rupture strength Summary

Be held on specimen between two annular pincers and be subjected to the effect of the power that increases gradually that the stainless steel ball of 0.625 inch diameter, polishing applies.Rupture strength is to cause the destructive power of sample.Rupture strength can be tested on wet or dry sample. Device

The tester Intelect-II-STD tension test instrument that breaks, catalog number (Cat.No.) 1451-24PGB or the Thwing-Albert tester that breaks is all applicable.These two kinds of instruments can (Philadelphia PA) obtains from Thwing-Albert Instrument Co..This instrument must be equipped with the force cell of a 2000g, and if the measurement of breaking of wetting, then this instrument must be equipped with force cell protective shield and a front panel water protective shield.The air conditioning chamber should maintain temperature and humidity control in the following limit

Temperature: 73 ± 3 (23 ℃ ± 2 ℃)

Humidity: 50 ± 2% relative humidity paper cutters can use shears or its suitable thing.Dish is used for the wet sample that breaks of dipping, is fit to sample size.The water that solution is used for flooding the wet sample that breaks should equilibrate to the temperature of air conditioning chamber.Timer is suitable for measuring dip time The preparation of sample

1) cutting sample becomes the size (4.5 inches * 4.5 inches of minimal sample sizes) be suitable for testing.Five samples of minimum preparation are used for testing under various conditions:

2) if wet the measurement of breaking, the cutting sample of suitable quantity is placed the dish of the water that fills up hygral equilibrium. The installation of equipment

1) according to the maker indication tester that breaks is installed.If usefulness is the Intelect-II-STD tester for elongation, then following condition is suitable:

Speed: 12.7 cm per minute

Fragmentation sensitivity: 20 grams

Peak load: 2000 grams

2) calibrate force cell according to the rupture strength of expection. Measure and record

1) operates this tester that breaks to obtain the rupture strength measured value of every kind of sample according to the indication of maker.

2) write down the rupture strength of every kind of sample, and calculate the meansigma methods and the standard deviation of rupture strength under every kind of condition.

3) meansigma methods under every kind of condition of record and standard deviation obtains immediate gram number.

Can be towards Xian's property Summary

Being defined as product at this term of using " flushable property " passes common commercially available domestic water closet and vertical pipe drainage system and does not cause and stop up or the ability of similar problem that the physical characteristic of this ability and product has direct relation.More specifically, the evaluation of the flushable property of menstruation product is by next water closet and drain steam trap also transport by a mimic perpendicular system easily.

Test program is designed to simulate a four-player family (two men, two woman) and normally used the lavatory two days.Adopt a kind of flush sequence to imitate following condition in the test: male's urine, the women urinates (comprise with fabric and drying after urine), handles the menstruation product, uses clean fabric, and stool.Amount to the used fabric of each fabric flushing is the normal load of two seven bar, or " high capacity " of five seven bar.Normal load is based on to be investigated consumer, consider that common custom and practice formulate, and the high capacity amount is 2.5 times of the normal load amount.If design this test and be situation about running into when imitation enters a kind of product municipal blow-off pipe or enters anaerobic tank by common lavatory flushing.The following performance of assessment sample: the 1) cleaning of water closet and urinal, 2) obstruction and 3 of blowdown pipeline) in the decomposition of flushing process. Device

The device that is suitable for washing test is shown among Figure 10 with plane graph.This device comprises:

3.5 the water-saving siphon eddy current toilet of gallon (13.2 liters) is called 210 (other water closet also can be received in the conduit line map shown in Figure 10 performance with the pressure toilet evaluation test sample that uses different flushing machines such as commodity);

About 59 feet (18 meters), internal diameter are the propylene acid tube (can see from Figure 10 that this pipeline is assembled into and is roughly squarely, has linear arrangement 211,213,215,217,219,221, nearly 10 feet (3 meters) are long) of 4 inches (10 centimetres);

A little along the cast iron T-joint 223 of toilet 210 flow directions be to atmosphere opening be used for ventilate;

90 ° of elbows 212,214,216,218 and 220 of five cast irons;

Minor matters 222, vertical place (Figure 11) leaves about 15 feet of the terminal of this pipe, and growing up is about 1 inch (2.5 centimetres); With

Screen cloth (No. 4 Tyler screen cloth) is in order to catch the solid effluent in decomposing evaluation.

The device that installation is used in this method makes it be equivalent to the ansi standard A112.19.2M-1990 that is used for Vitreous China fixture.This pipeline is vertically arranged to provide every foot pipe range decline 0.25 inch (2 centimetres/meter). MaterialControl fabric products C HARMIN ^Synthetic Excreta material prepares according to following method The test flush sequence

The order imitation four-hole family (two woman, two men) of test flushing normally used the lavatory 2 days (based on the investigation to consumer's custom and practice).The order of 34 flushings comprises and washes empty toilet 14 times altogether, only washes fabric 8 times, 6 flushing fabrics and a kind of menstruation product, and 6 flushing fabrics and mimic EM (SFM).During use, SFM is prepended in the toilet at the adding fabric.The load of this SFM is 160g ± 5g, comprises the tablet of two 1 inch (2.5 centimetres) * 4 inches (10 centimetres) and the tablet of one 1 inch (2.5 centimetres) * 2 inches (5 centimetres).With 10 seconds intervals folding fabric strip (or menstruation product) is put into toilet.Last bar or pad are put into toilet after 10 seconds, beginning flushing.Flush sequence is a series of with the bonded two kinds of routines of following order as described below:

Routine #1(carrying out 6 times in totally 30 flushings)

1) only flushing tissue-after water arrives mimic barrier to read a blowdown circuit in 2 minutes stifled

The plug reading, wait one minute again after, move to step 2.

2) wash empty toilet.Arrive minor matters at water and put the obstruction of reading a blowdown circuit back 2 minutes

Reading also moves to step 3.

3) flushing fabric and liner-arrive minor matters at water to put back 2 minutes reads a blowdown circuit

Stop up reading, wait one minute again, move to step 4 then.

4) wash empty toilet.Arrive minor matters at water and put back 2 minutes, read that a blowdown circuit stops up

Reading, and move to step 5.

5) flushing fabric and mimic Excreta (SFM).Arrive minor matters at water and put back 2 minutes, read one

The obstruction reading of individual blowdown circuit waits 1 minute again.

Routine #2(carrying out once)

1) only washes fabric-arrive minor matters at water to put the obstruction of reading a blowdown circuit back 2 minutes

Reading waits 1 minute again, and moves to step 2.

Reading moves to step 3.

3) only wash fabric-arrive minor matters at water to put back 2 minutes, read a blowdown circuit and stop up and read

Number waits 1 minute again, moves to step 4 then.

4) wash empty toilet.Arrive minor matters at water and put back 2 minutes, read a blowdown circuit obstruction and read

Number.

Total washing time is 34 in each program.

If the arbitrfary point in cleaning procedure, product after the flushing still in toilet or collecting pit, then this fabric and/or protective pad are manually disclosed in the blowdown circuit, cleaning procedure continues.After finishing each test load, cleaning blowdown pipeline before ensuing test begins.

With above-mentioned cleaning procedure to every kind of test products triplicate, to every kind of reference product triplicate. Data record

Determining of blowdown circuit chocking-up degree is by measuring the length of barrier rear enclosed water.Per 12 inches (30 centimetres) calibrates on the blow-off pipe of barrier upper reaches.The length of the water of each foot supporting is equivalent to the obstruction of at the barrier point place 0.25 inch (0.6 centimetre) or 6.25%.Collect the test products residue in blow-off line exit.

Following is the data of record in each the evaluation:

1) can not clean the situation of toilet and urinal

2) situation of Fei Li (difficulty), but successfully carried out the flushing of toilet and urinal

3) distribution of product on the simulation minor matters

4) at utmost (%) of blowdown circuit obstruction

5) the blowdown circuit is blocked in the accumulation degree (%) in two days Synthetic excremental preparation

I. Material requested

The synthetic Excreta of Feclone (900 gram);

(can be from Siliclone Studio, Valley Forge, PA is as the dried concentrate of product B FPS-7)

100 ℃ tap water (6066 gram)

II. Equipment needed thereby

Blender (can be from Hobart Corp., the Model A200 that Troy, OH obtain)

Extruder (can be from Hobart Corp., the Model 4812 that Troy, OH obtain)

The disposable centrifuge tube (50ml) of band nut (can be from VWRScientific, Chicago, IL gets

Arrive, catalog number (Cat.No.) is 21-008-176)

Water-bath is controlled to be 37 ℃ with temperature.

III. Preparation

1. 100 ℃ water is poured in the mixing ware of blender, and added dried Feclone concentrate.

2. mixed on low speed is 1 minute.

3. middling speed was mixed 2 minutes.

Material mixing good after, be transferred to extruder.

5. use the ice hoe, make a call to a duck eye at the tip of each centrifuge tube.

6. Feclone is clamp-oned in the centrifuge tube.

7. cover centrifuge tube and be stored in the refrigerator.

8. before use, these pipes are put into 38 ℃ water-bath.

Hydrostatic head Summary

Can pass sample with the height of water column on the specimen material of liquid support that cannot see vestige moves. Device The air conditioning chamberShould control temperature and humidity to maintain in the following restriction:

Temperature: 73 ± 3.F(23℃±2℃)

Humidity: 50 ± 2% relative humidity test set test set is shown among Figure 12, comprising:

A water container 300, it comprises:

1. the diameter of a glass tubing 2.125 inches (0.84cm) is labeled as 310;

2. fill pipe 312 for one, be suitable for the water source (not shown) being sent to glass with controlled speed

In the pipe 310;

3. close/open valve 313, are used for control and whether water are transported to water container 300;

4. portrayal is at glass tubing 310 lip-deep graticules, and the measured value that is suitable for hydrostatic head is accurate to ±

1 centimetre;

5. a protruding cooperation 316 is suitable for accepting shuttle 320; With

6. ring-shaped rubber packing ring 318 places the below of glass tubing 310 lower surfaces; And shuttle 320, it comprises:

1. recessed cooperation 322;

2. annular sample support 324 is connected in the lower edge of recessed cooperation; With

3. ring-shaped rubber pad 326.

Ring support is used at vertical direction fixing test device and anchor clamps

Mirror places the below of shuttle 320, helps to observe water penetrating sample

Method

1. assemble this device, use ring support and anchor clamps that water container 300 is fixed on vertical direction, adjustable water source is connected on the supply pipe 312;

2. regulate water temperature to 73 ± 2 (23 ° ± 1 ℃)

3. in shuttle 320, insert a kind of fluid-tight interval (for example polyethylene film), shuttle 320 is screwed on the water container 300, open close/open valve 313, regulate current (adjusting device is not shown among Figure 12), so hydrostatic head rises with the speed of 1 inch ± 0.1 inch of per minute (2.5 centimetres ± 0.25 centimetre of per minute), closes close/open valve 313 then.

4. diameter of cross cutting is 2.625 inches a circular sample, and this sample is inserted in the shuttle 320.For the backsheet sample of the preferred embodiment of the invention, the placement that should face up of the surface with waterproof resin.(this sample should place the air conditioning chamber two hours at least before test).

5. shuttle 320 is screwed on the water container 300, in this process, should carefully make the sample fold.Screw shuttle, make its foot can guarantee not reveal around the sample.

6. below shuttle 320, place mirror.

7. opening close/open valve 313 introduces current in the water container 300.

8. by observing the exposed surface of mirror observing samples.The signal of water infiltration is included in the bottom surface formation pearl of sample and the expansion of visual color change.

9. when observing infiltration for the first time, the height of record water column is as the hydrostatic head of sample.

10. repeated measure is also calculated meansigma methods and the standard deviation of measuring 5 times.

Surface moisture Summary

Surface moisture is that the test that occurs causing through top flat the amount of liquid that topsheet surface is moistening from absorbent structure (sanitary towel 20 as shown in fig. 1) is measured in a kind of design.The moisture content amount that sees through top flat is called " surface moisture ", and if be used for estimating that wearer's skin contact absorbent structure places, which kind of degree wearer's skin will be dried to. Method

This test comprises the top sheet materials sample moistening of one 4 inches (10 centimetres) * 4 inches (10 centimetres), be stacked in the wood fragments pulp fibres that supine health face 24A on the hygroscopic piece of standard preferably includes one deck air lay simultaneously, it is encapsulated in a pair of simulation urine solution that has (from Jagco Pharmaceu-ticals, Mehcanicsburg is PA) between the wet strong tissue layer.(4.0 ± 0.3ml) are sent to sample surfaces with mimic urine solution to utilize a kind of syringe pump.After this mimic urine is sent to sample, on each sample, use the pressure load of uniform 0.25 pound/square inch (1.7kPa), so the uniform distribution on whole sample of this sample.After having transmitted all simulation urine, allow the sample of this moistening under noiseless, leave standstill 5 ± 0.5 minutes.Leave standstill in the process at sample, cover this sample so that evaporation is minimum with polyethylene film.Temporarily remove pressure.On the uppermost surface of moisture absorption sample top flat, insert preweighted filter paper (seven layers) sample, be approximately 5 inches (12 centimetres) * 5 inches (12 centimetres) (suitable filter paper sample can be from Mt.HollySprings, the Ahlstrom Filtration Company of PA obtains, and is Paper No.632).With using the time that 0.5 pound of/square inch predetermined needed enough weight of (3.4kPa) pressure load affacted on the sample 15 ± 1 seconds, remove then.Remove filter paper, once more it is weighed.The amount of liquid that filter paper absorbs just is called as " surface moisture " of sample.The result shows with the gram numerical table of the liquid that filter paper absorbs.The result should be conspicuous, and lower " surface moisture " numerical table shows higher surperficial dry feeling.

Critical surface tension

Method at TAPPI (" TAPPI ") method T698 pm-83, " definite (the Visking analytical technology of modification) of polyethylene and polypropylene screen wetting tension " used with above-mentioned described method basically, and the tensile liquid series of commercially available known surface is (from Corotec Corporation, Collinsville, CT obtains) mixture that replaces narrating in the TAPPI method use be except, and and the hairbrush supplied together of Corotec series replaced cotton to wipe away use.

Although illustrated and described the special embodiment of the present invention, various other variation and the modification concerning the one of ordinary skilled in the art in not breaking away from aim of the present invention and scope are conspicuous.Therefore in appending claims, will plan all such change and variations in the covering scope of the invention.

Claims

One kind can be by the absorbent device of aqueous dispersion and flushing, this absorbent device comprises:

A kind of liquid top flat comprises one first fiber module that wherein is mixed with temporary transient wet strengthening resin, and the part dignity of wherein said top flat preferably has a kind of first resin material, and described first fiber module more preferably also comprises a kind of fabric of foraminous wet-laying;

A kind of liquid-tight egative film, place described top flat below, described egative film comprises a kind of second fiber module that wherein is mixed with temporary transient wet strengthening resin, this egative film has at least one side to be applied by a kind of second resin material, wherein said second resin material is a waterproof, and described second fiber module preferably contains the fabric of wet-laying; With

An absorbent article core, place between described top flat and the described egative film, wherein use a kind of water soluble adhesive that the described top flat and the described end are connected in the neighboring area at least together to encapsulate described absorbent article core, preferred therefore described water soluble adhesive makes described absorbent device, immerses the parts that are separated into it when slightly stirring in the water and with water at described absorbent device.
2. according to a kind of absorbent device of claim 1, wherein said first resin material comprises a kind of fibril of waterproof resin material.
3. according to a kind of absorbent device of claim 1 or 2, wherein said part health face provides many zones than low-surface-energy, and this preferably is provided is because described first resin material comprises a kind of polyorganosiloxane resin than low-surface-energy.
4. each a kind of absorbent device in requiring according to aforesaid right, wherein said absorbent device comprises that also a kind of being used for be connected to parts on wearer's underwear with described absorbent device, and the described parts that are preferred for connecting described absorbent device are a kind of water-sensitive adhesives.
5. each a kind of absorbent device in requiring according to aforesaid right, wherein said egative film has a health face and a medicated clothing face, and described second resin material makes the anti-at least about 18 centimetres hydrostatic head of described egative film, makes the health face of described egative film that critical surface tension greater than about 34 dynes per centimeter be arranged.
6. each a kind of absorbent device in requiring according to aforesaid right, wherein said fibriilar density is at about 3000 fibrils (every square centimeter of 465 fibril) and about 5000 fibrils per square inch between (every square centimeter of 775 fibril) per square inch.
7. each a kind of absorbent device in requiring according to aforesaid right, wherein said absorbent device also has longitudinal centre line and cross central line and pair of longitudinal side, and described sanitary towel comprises that also at least one is connected to an above-mentioned side and horizontal outward extending flap.
8. method of making a kind of impenetrable liquid and flushable net, said method comprises the following steps:

A kind of substrate that first side and second side are arranged is provided, and described both sides are relative;

A kind of flowable first resin material is provided;

First graining roll that first longitudinal axis is arranged is provided, and described first graining roll can be around described first longitudinal axis rotation;

One first bottom surface is provided, and locate with respect to described first graining roll described first bottom surface, thereby form a roll gap betwixt;

With transfer rate described substrate is conveyed through described first roll gap;

Described flowable first resin material is deposited on described first graining roll;

Rotate described first graining roll so that first peripheral speed to be provided around described first longitudinal axis, described first peripheral speed is bigger by 100% than described transfer rate at least, therefore produces first speed difference;

It is characterized by:

Described first resin material on described first graining roll is applied on the described first side of described substrate, described first resin material has the shearing force that is caused by described first speed difference, and described thus first resin material is injected in the described substrate;

Described method preferably also comprises the following step:

A kind of flowable second resin material is provided;

Second graining roll that one second longitudinal axis is arranged is provided, and described second graining roll is around described second longitudinal axis rotation;

One second bottom surface is provided, and place with respect to described second graining roll described second bottom surface, forms second roll gap betwixt;

Transmit described substrate with described transfer rate and pass described second roll gap;

Described flowable second resin material is deposited on described second graining roll;

Rotate described second graining roll so that second peripheral speed to be provided along described second longitudinal axis, described second peripheral speed is bigger at least by 100% than described transfer rate, therefore produces a second speed difference;

Described second resin material on described second graining roll is applied on the described side of described substrate, described second resin material has the shearing force that is caused by described second speed difference, and described thus second resin material is injected in the described substrate.
9. method according to Claim 8 is characterized in that described second resin material is injected into the described first side of described substrate.
10. method according to Claim 8 is characterized in that described second resin material is injected into the described first side of described substrate.
11. to the method for each claim of 10, it is characterized in that described resin fully is injected in the described substrate, thereby the thickness of the described substrate that provides is provided the thickness of described net according to Claim 8.
12. to the method for each claim of 11, wherein said first resin material is different with described second resin material according to Claim 8.
13. a liquid proof web material, wherein said web material comprise a kind of fiber module that scribbles damp proof resin material, are characterised in that any method of using in the claim 8 to 12, and described damp proof resin material is administered on the described fiber module.
14. a net transflective liquid, that water can disperse and wash is characterised in that described net comprises, is combined into:

A kind of cellulose fibre substrate, the fabric of preferred a kind of wet-laying or a kind of non-woven material, described substrate comprise a kind of temporary transient wet strengthening resin that mixes, and described substrate preferably includes a large amount of holes; A large amount of single fibrils are attached on the surface of described substrate, and outwards stretch, and described fibril is preferably made by a kind of waterproof resin material, and described resin material preferably includes a kind of polyorganosiloxane resin.
15. according to the net saturating liquid, that water can disperse and wash of claim 13, its feature is that also described substrate has various surface topography.
16. according to the net saturating liquid, that water can disperse and wash of claim 13, its feature is that also described substrate has uniform surface topography.
17. according to each net saturating liquid, that water can disperse and wash of claim 13 to 15, its feature is that also described fibril comprises a kind of covering agent.